Frame structure design for new carrier type (NCT)

• US 9,712,302 B2
• Filed: 05/29/2015
• Issued: 07/18/2017
• Est. Priority Date: 04/09/2012
• Status: Active Grant

• Current Assignee: Apple Inc.
• Original Assignee: Intel Corporation
• Inventors: He, Hong, Fwu, Jong-Kae
• Primary Examiner(s): PASIA, REDENTOR M
• Application Number:
  US14/725,550
• Publication Number:
  US 20150263839A1
• Time in Patent Office: 781 Days
• CPC Class Codes: H04L 12/189 in combination with wireless systems selective distribution or broadcast in wireless communication networks H04W4/06
• CPC Class Codes: H04L 27/2602 Signal structure
• CPC Class Codes: H04L 27/261 Details of reference signals
• CPC Class Codes: H04L 27/2657 Carrier synchronisation
• CPC Class Codes: H04L 27/2692 with preamble design, i.e. with negotiation of the synchronisation sequence with transmitter or sequence linked to the algorithm used at the receiver
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04L 5/0051 of dedicated pilots, i.e. pilots destined for a single user or terminal
• CPC Class Codes: H04L 5/1469 using time-sharing
• CPC Class Codes: H04L 51/58 Message adaptation for wireless communication
• CPC Class Codes: H04L 65/613 for the control of the source by the destination control signals issued by the client directed to the server or network components specially adapted for selective content distribution H04N21/637
• CPC Class Codes: H04N 21/44209 Monitoring of downstream path of the transmission network originating from a server, e.g. bandwidth variations of a wireless network arrangements for maintenance or administration in data switching networks involving bandwidth and capacity management H04L41/0896
• CPC Class Codes: H04N 21/643 Communication protocols network streaming protocols, e.g. real-time transport protocol [RTP] or real-time control protocol [RTCP], H04L65/65
• CPC Class Codes: H04W 24/08 Testing, supervising or monitoring using real traffic
• CPC Class Codes: H04W 4/14 Short messaging services, e.g. short message services [SMS] or unstructured supplementary service data [USSD]
• CPC Class Codes: H04W 4/50 Service provisioning or reconfiguring
• CPC Class Codes: H04W 48/12 using downlink control channel
• CPC Class Codes: H04W 48/18 Selecting a network or a communication service
• CPC Class Codes: H04W 60/04 using triggered events
• CPC Class Codes: H04W 76/16 Involving different core network technologies, e.g. a packet-switched [PS] bearer in combination with a circuit-switched [CS] bearer
• CPC Class Codes: H04W 8/06 Registration at serving network Location Register, VLR or user mobility server
• CPC Class Codes: Y02D 30/70 : in wireless communication networks

Abstract

A system and method utilizes a selected PRB configuration for a new carrier type for a 3GPP-type wireless network. A downlink signal is received that comprises a demodulation reference signal pattern in at least one predetermined subframe of the downlink signal. The subframe comprises a first predetermined number of the plurality of orthogonal frequency division multiplex (OFDM) symbols comprising synchronization signals for a legacy version of the downlink signal and the demodulation reference signal pattern comprising a second predetermined number of OFDM symbols that are different from the first predetermined number of the plurality of OFDM symbols. After receiving the downlink signal, the demodulation reference signal pattern in the downlink signal is demodulated.

Claims

1. An apparatus comprising processing circuitry to:

receive a downlink signal from a transmitter, the downlink signal comprising a radio frame having multiple subframes comprising a band of physical resource blocks (PRBs), the PRBs comprising orthogonal frequency division multiplex (OFDM) symbols;

demodulate the received downlink signal using a first demodulation reference signal (DMRS) pattern for a first group of PRBs having a potential for collisions with one or more synchronization signals, wherein the first group of PRBs comprises a center group of six PRBs disposed about a center of system bandwidth; and

demodulate the received downlink signal using a second DMRS pattern for a second group of PRBs without a potential for collisions with one or more synchronization signals, wherein the second group of PRBs comprises a group of PRBs located outside the center group of six PRBs;

wherein the first DMRS pattern is arranged to avoid collision between a reference signal and a synchronization signal; and

wherein the first DMRS pattern for the first group of PRBs comprises UE reference signals on OFDM symbols 0-1 and 7-8 for one or more PRBs of the first group of PRBs, and wherein the first DMRS pattern is used as the second DMRS pattern for the second group of PRBs in one or more subframes.

2. An apparatus as claimed in claim 1, wherein first DMRS pattern and the second DMRS pattern are applied in PRBs of subframe 0 and subframe 5 of the radio frame.

3. An apparatus as claimed in claim 1, wherein the first group of PRBs are centered about the center of the band, and the second group of PRBs are disposed at a lower end and an upper and of the band.

4. An apparatus as claimed in claim 1, wherein the first DMRS pattern comprises UE reference signals on OFDM symbols 2-3 and 12-13 for one or more PRBs of the first group of PRBs.

5. An apparatus as claimed in claim 1, wherein the first DMRS pattern comprises UE reference signals on OFDM symbols 1-2 and 12-13 for one or more PRBs of the first group of PRBs.

6. An apparatus as claimed in claim 1, wherein the first DMRS pattern comprises UE reference signals on OFDM symbols 0-1 and 12-13 for one or more PRBs of the first group of PRBs, wherein resource elements for cell specific reference signal (CRS) port 0 are not present for any collision resource elements.

7. An apparatus as claimed in claim 1, wherein the first DMRS pattern comprises UE reference signals on OFDM symbols 5-6 in an even slot, and OFDM symbols 2-3 in an odd slot, for one or more PRBs of the first group of PRBs.

8. An apparatus as claimed in claim 1, wherein the first DMRS pattern comprises UE reference signals on OFDM symbols 5-6 in an even slot, and OFDM symbols 4-5 in an odd slot, for one or more PRBs of the first group of PRBs.

9. An apparatus as claimed in claim 1, wherein the processing circuitry is disposed in a user equipment (UE).

10. An apparatus as claimed in claim 1, further comprising a touch screen to control an input of the apparatus.

11. An article of manufacture comprising a non-transitory medium having stored thereon instructions that, if executed, result in:

receiving a downlink signal from a transmitter, the downlink signal comprising a radio frame having multiple subframes comprising a band of physical resource blocks (PRBs), the PRBs comprising orthogonal frequency division multiplex (OFDM) symbols;

demodulating the received downlink signal using a first demodulation reference signal (DMRS) pattern for a first group of PRBs having a potential for collisions with one or more synchronization signals, wherein the first group of PRBs comprises a center group of six PRBs disposed about a center of system bandwidth; and

demodulating the received downlink signal using a second DMRS pattern for a second group of PRBs without a potential for collisions with one or more synchronization signals wherein the second group of PRBs comprises a group of PRBs located outside the center group of six PRBs;

wherein the first DMRS pattern is arranged to avoid collision between a reference signal of the transceiver and a synchronization signal; and

wherein the first DMRS pattern for the first group of PRBs comprises UE reference signals on OFDM symbols 0-1 and 7-8 for one or more PRBs of the first group of PRBs, and wherein the first DMRS pattern is used as the second DMRS pattern for the second group of PRBs in one or more subframes.

12. An article of manufacture as claimed in claim 11, wherein first DMRS pattern and the second DMRS pattern are applied in PRBs of subframe 0 and subframe 5 of the radio frame.

13. An article of manufacture as claimed in claim 11, wherein the first group of PRBs are centered about the center of the band, and the second group of PRBs are disposed at a lower end and an upper and of the band.

14. An article of manufacture as claimed in claim 11, wherein the first DMRS pattern comprises UE reference signals on OFDM symbols 2-3 and 12-13 for one or more PRRBs of the first group of PRBs.

15. An article of manufacture as claimed in claim 11, wherein the first DMRS pattern comprises UE reference signals on OFDM symbols 1-2 and 12-13 for one or more PRBs of the first group of PRBs.

16. An article of manufacture as claimed in claim 11, wherein the first DMRS pattern comprises UE reference signals on OFDM symbols 0-1 and 12-13 for one or more PRBs of the first group of PRBs, wherein resource elements for cell specific reference signal (CRS) port 0 are not present for any collision resource elements.

17. An article of manufacture as claimed in claim 11, wherein the first DMRS pattern comprises UE reference signals on OFDM symbols 5-6 in an even slot, and OFDM symbols 2-3 in an odd slot, for one or more PRBs of the first group of PRBs.

18. An article of manufacture as claimed in claim 11, wherein the first DMRS pattern comprises UE reference signals on OFDM symbols 5-6 in an even slot, and OFDM symbols 4-5 in an odd slot, for one or more PRBs of the first group of PRBs.